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Airflow
The printer uses two fans to cool its internal parts. Ensure that you do not block the
air vents. Lack of correct cooling and ventilation can cause printer failures and
improper operation.
Declaration of IBM Product Noise Emission Values
The following tables show the noise emission values for the 4247 Printer.
Table 19. 4247 Printer Model A00
Impulsive Noise Prominent Discrete Tones
No No
Table 20. Sound Emission Levels - 4247 Standard Covers
Sound Emission Category Operating Idling
LWAd 7.0 bels 3.9 bels
<LpA>m 56 dB 24 dB
Table 21. Sound Emission Levels - Automatic Sheet Feeder Covers
Sound Emission Category Operating Idling
LWAd 7.3 bels 4.0 bels
<LpA>m 60 dB 25 dB
Notes:
1. LWAd is the declared sound power emission level for a production series of
machines.
2. <LpA>m is the mean value of the space-averaged sound pressure emission
levels at the one-meter positions for a production series of machines.
All measurements are made in accordance with the American National Standards
Institute (ANSI) S12.10 and reported in conformance with the International
Organization for Standardization (ISO) 9296.
Operator and Service Clearance
You must be able to reach the front and rear of the printer to operate the printer.
Your service representative must be able to access all sides of the printer while
performing maintenance. Use Table 18 on page 161,and Figure 49 on page 167 (or
Figure 50 on page 168 if your printer has the Automatic Sheet Feeder installed) to
determine the clearance you need for your printer, and to select the location for
your printer.
Symbols that appear in specification drawings are defined in the following table.
Symbol Depicts
–––– Required clearance
Signal cable entry/exit
166 4247 Printer Model A00 User’s Guide